Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach dien » mach dien, sach tien, dich dien
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
khoa than » khoa luan, hoa thai, hoa tan
dien hoc » dien hoa, khien hoc, tin hoc
cong may » cong xay, cong hay, cong my
su sach » so sach, vu sach
cong ma » cuong ma, cong ha, cong va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach dien hoc chuyen đe ky thuat: kien thuc bach khoa than ((cong may) OR (cong ma)) dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach dien hoc chuyen đe ky thuat: kien thuc bach khoa than ((cong may) OR (cong ma)) dinh".
• Adding a wildcard symbol may retrieve word variants: su sach dien hoc chuyen đe ky thuat: kien thuc bach khoa than ((cong may) OR (cong ma)) dinh*.